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How does the Saito FA-30 compare to OS FS-30

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How does the Saito FA-30 compare to OS FS-30

Old 10-23-2007, 03:10 AM
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Default How does the Saito FA-30 compare to OS FS-30

I've done a search on small 4-strokes, but most of the comparison stuff seems to be Magnum vs. OS or Magnum vs. Saito. But I'd really like to know how the OS and Saito engines compare to each other in terms of power, reliability, ease of use and breaking in, mounting (say, one has more trouble than other inverted), and idle characteristics. Thanks, guys.
Old 10-23-2007, 06:08 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I have all these engines. I rank mine in power as the Saito the most powerful and my OS the least powerful. But I do have three Saitos and one OS.

However there are a lot of things that enter into liking an engine or thinking it is the best one.

I'm not one to like inverted engines and only have one plane with its engine inverted. None of them are 30's.

The Saito is no longer sold by Saito and one be a little harder to come by than the other two.
Old 10-23-2007, 10:12 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30


ORIGINAL: w8ye

However there are a lot of things that enter into liking an engine or thinking it is the best one.
Actually, power isn't a major concern, but reliability and ease of break in are. A lower idle is also nice (I've read that the Magnum idles high). I've also seen the dimensions of the engines on paper, and it seems the Saito is a hair larger in size than the OS. Does this seem to hold when you're looking at them in real life? thanks again
Old 10-23-2007, 10:33 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

Yes, and although my particular Magnum seems to have more power than my OS, The Magnum does idle faster than the other engines.

All three engines have the same mounting holes and dimensions
Old 10-23-2007, 10:56 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

w8ye, do either the Saito or the OS give you any problems? All things considered, which do you like more?

If I get one of these engines, it'll be mounted on its side for a cub or the GP T-craft. I've seen pictures of the OS in the Taylorcraft and the rocker cover sticks out a little. If I use the Saito, then wouldn't those 2 covers stick out a lot more?

The other thing is that the OS muffler is larger than that of the Saito or Magnum. However, the OS26 muffler is nice and small. Would I be able to mount the OS26 muffler onto the OS30? Would that make too much noise?
Old 10-23-2007, 01:43 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I like side mounted engines better than any other position.

But the 30's of all brands cannot have their carbs reversed and therefore on a side mounting, the needle valve is out the bottom.

Th only problem I've had is that on a new Magnum the screw are prone to back out until you have tightened them a few times.

My magnum 30 broke a valve spring the other day. I have (or have had) many magnums and this is the first one to have trouble.
Old 10-23-2007, 06:14 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I have both the Saito and O.S. .30. At least with mine, the power seems about the same. The .30 O.S. is in service while the Saito waits for a plane.
Old 10-23-2007, 06:50 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

disregard....
Old 10-23-2007, 08:21 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

Being as there might possibly be some interest. I've had two Magnum 30's One was new and I noticed it wanted to get hot with a 10-6 at first. I always ran a 10-5 on it. Had inverted couldn't get it to be reliable. Ran great up right and never had any more trouble with it. Since sold the engine

My second Magnum 30 was part of a horse trade. It looked new inside and out but had been run at least once before I got it? Anyway, it pulls a MAS 10-6 like it was nothing. I haven't put it on a plane yet.

I have three Saito 30's, they all pull a APC 10-6 very well from brand new.

I ran a 10-5 on the OS. It's not in a plane right now. I got run over by a 90 brisson
Old 10-23-2007, 09:12 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I have two of the Saito .30s, one plain and one GK, the plain one has a black cylinder because I loaned it to Bill Robison for his Saito notes and he blackened the cylinder. It turns a 10x5 Graupner at 10,400 rpm on 15% WildCat Premium Extra.
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Old 10-24-2007, 12:27 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I have two Saito 30s, one OS and one Magnum 30. I like all three brands and have had no problems with any of them (one Saito is unrun)

Like w8ye I find the idle to be a bit faster with the Magnum. I recall no significant difference in power among the three (one of the Saitos is unrun).

I have not run any of the 30s inverted or side mounted.

jess

Old 10-25-2007, 02:46 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

This is my WM Cub-26. DaveinLA wanted to see it sticking out the side of the plane. On my new Cub (same model) I have a TT Cub dummy engine on it but no pictures on my harddrive (peculiar) but I will take and post it if you want, Dave.

Cheers,
Big

Having problems with my upload of pictures but I think it's okay now.
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Old 06-19-2013, 07:00 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I've been 'breaking in' a new Saito FA30, slow & easy... have run about a quart of 15% nitro through it, Vess 10x6 prop; after-run oil in crankcase after every run. it has the stock muffler.

the 'guide' I'm using suggests I should be able to achieve an idle speed of 2200- 2500 rpm; so far the slowest, even sustained idle I can get is a bit over 3,000 rpm. somewhere else on the web I saw a comment that it won't reach a reliable slow idle until it's had a couple gallons of fuel run through it...!

I would really appreciate your insights/ observations on this engine. I hope to mount it in a Ben Buckle 'Super Scorpion' 66" 'old tmer' one of these days.

Sincerely,

canardz
Old 06-19-2013, 07:22 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

Ihave the Mag .30, OS26 and a Saito .40 which Ibelieve is about as small as the .30.
The Magnum gave me some troubles until Ifigured out the muffler pressure tap was parially blocked, flew it on my SIG Kadet Jr and it was plenty of power and will cruise all day on a thimble of fuel.
The Saito 40 is simply excellent, and flew my Pheonix Models Sonic really well.
The OS 26 is a sweet engine but I have yet to mount it on anything.
Old 06-20-2013, 04:43 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

Can, my .30 is an early one although I don't think they changed them any. I always ran a Fox Miracle plug and either a Graupner 10x5.5 or a Graupner 10.5x5. If the grass was a little long I ran the 10.5x5 and would literally jerk a Sig LT 25 out of the grass. With the airbleed screw slightly closed beyond 50% it will idle right at 2,500. Even with the addition of a nose gear and bolt on wing the .30 flew the LT 25 very well.
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Old 06-20-2013, 07:33 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

Ihave always wanted an LT 25.
Old 06-20-2013, 01:34 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

Jeff, its sort of a, stack up the parts and then glue them, kit.
Old 06-20-2013, 07:47 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

Thats right up my alley then.
Old 06-20-2013, 11:18 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

G'day

You will love the LT-25. I am on my second one. The first had a Magnum 30FS which flew it perfectly. I later sold it and a friend put a Leo 46 in it which was total overkill though he did run it on FAI fuel and never over half throttle. I ended up buying it back and I put a very old OS FS 40 in it and it was great with that engine.

I also have a Saito 30. I was told it would be perfect for my Phoenix Tiger Moth but it was just a bit too "scale" so I tried the OS FS 40 and it was about the same so the plane ended up with a Saito 40.

I now have the Saito 30 in a Dynaflite Butterfly which originally had an OS FS26 in it. The Saito is considerably more powerful than the 26.

I now have a new LT-25 as I gave the old one to a friend who needed something to fly and he happened to have an OS FS 40. My new one has an Enya 36 which is PERFECT for the LT-25. Plenty of power, light, economical and the LT flies sooooo well. I think you will find the Saito 30 just right in the LT-25 too and the LT series are really easy to build.

I also have the LT-40 and my current one has a Saito 62 which is overkill but nice. Both my LTs are covered in Solatex. It is a little heavier than plastic film but it is just so nice to use AND so long lasting. Balsa USA carries it.

Cheers

Mike in Oz
Old 06-21-2013, 05:46 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

Dave i am and was always surprised by how much plane the 30 would fly and on the bench it will easily rip a 10x6 mas prop.I hav'nt run it for a while and clubmates used to say i don't believe a small engine would do that well.
Old 06-21-2013, 06:52 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I think the Saito .30 is a lot like a 302 Ford V-8, they always ran big for their size. The .30 has huge valves for its displacement, so obviously it breaths well and that equals torque.
Old 06-21-2013, 10:01 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I have a new Saito 30 GK and almost bought the LT-25 kit until I saw the price. I got the 4*20 kit instead for $80 and am about halfway through.
Old 06-21-2013, 06:07 PM
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Default RE: How does the Saito FA-30 compare to OS FS-30

One of the designers of the 4 Star 20 told me he felt the little 26 through 30 four strokes would be excellent.
Old 06-22-2013, 01:25 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I have the 30 in a pheonix rainbow,it's a perfect match tho overpowered compared to the electric version but who's counting?
Old 06-22-2013, 09:40 AM
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Default RE: How does the Saito FA-30 compare to OS FS-30

I had to change a lot on the 4*20 for the Saito 30. I think I extended the fuselage nose 1 1/2 inches for the engine with 1/4 sq balsa.

Who was the designer you spoke with? I pm'ed Bruce Tharp for a while about his work at Sig on 4*s and his Flying King kit.

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